One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,9,10)(7,11,12,8)(13,14,18,19)(15,20,17,16)(22,24)(23,28)(6,10)(8,11)(13,15,18,17)(14,16,19,20)(21,22,26,24)(23,25,28,27)(13,16)(14,15)(17,19)(18,20)(21,23,26,28)(22,27,24,25)(1,2)(3,4)(5,7)(6,8)(9,12)(10,11)(13,17,18,15)(14,16,19,20)(21,24,26,22)(23,25,28,27)(5,8)(6,7)(9,11)(10,12)(13,16)(14,15)(17,19)(18,20)(21,25)(22,23)(24,28)(26,27) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.